// Copyright 2003-2023 by Autodesk, Inc. 
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted, 
// provided that the above copyright notice appears in all copies and 
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting 
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS. 
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  AUTODESK, INC. 
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to 
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.

using System.Collections;

namespace Glodon.Lookup.Core.ModelBase
{
    public sealed class ResolveSet
    {
        public ResolveSet()
        {
            Variants = new Queue<ResolveSummary>(1);
        }

        public ResolveSet(int capacity)
        {
            Variants = new Queue<ResolveSummary>(capacity);
        }

        public Queue<ResolveSummary> Variants { get; }

        public static ResolveSet Append(object result)
        {
            return new ResolveSet().AppendVariant(result);
        }

        public static ResolveSet Append(object result, string description)
        {
            return new ResolveSet().AppendVariant(result, description);
        }

        public ResolveSet AppendVariant(object result)
        {
            if (result is null) return this;
            if (result is ICollection && (result as ICollection).Count == 0) return this;
            Variants.Enqueue(new ResolveSummary
            {
                Result = result
            });

            return this;
        }

        public ResolveSet AppendVariant(object result, string description)
        {
            if (result is null) return this;
            if (result is ICollection && (result as ICollection).Count == 0) return this;
            Variants.Enqueue(new ResolveSummary
            {
                Result = result,
                Description = description
            });

            return this;
        }
    }
}
